This variable is for host key generating. For the set behavior: Set it to genRsaKey(2) to generate the RSA host key, and to genDsaKey(3) to generate the DSA host key, if genBothKeys(4) is set, both RSA and DSA host key are generated. For the get behavior: You will get genRsaKey(2), genDsaKey(3) or genBothKeys(4) when the key gen action is in progress. otherwise, you will get noGen(1).